Topics: tagesschau, Evening News, Germany

Topics: tagesschau, Evening News, Germany

Topics: tagesschau, Evening News, Germany

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1.0

Sep 18, 2015
09/15

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MBC

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2.0

Sep 18, 2015
09/15

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MBC

movies

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Sep 22, 2013
09/13

by
Tao Xiang

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Localization lengths of superconducting quasiparticles $\lambda_s$ are evaluated and compared with the corresponding normal state values $\lambda_n$ in one and two dimensional lattices. The effect of superconducting correlation on the localization of quasiparticles is generally stronger in an off-site pairing state than in an on-site pairing state. The modification of superconducting correlation to $\lambda$ is strongly correlated with the density of states (DOS) of superconducting...

Source: http://arxiv.org/abs/cond-mat/9503152v1

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Sep 22, 2013
09/13

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John Lott

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We define analytic indices which involve the eta form and the analytic torsion form. We show that these indices are independent of the geometric choices made in their definitions, and hence are topological in nature.

Source: http://arxiv.org/abs/dg-ga/9503005v1

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Sep 22, 2013
09/13

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A. V. Leonidov; P. V. Ruuskanen

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We consider the dilepton emission from a dense and hot hadron gas near a critical point. The hadron gas is described as a resonance one. The dilepton spectrum generated by vector resonances is shown to be equivalent to the one generated by quarks.

Source: http://arxiv.org/abs/hep-ph/9503309v1

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Sep 22, 2013
09/13

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Gert-Martin Greuel; Christoph Lossen

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We consider flat families of reduced curves on a smooth surface S such that each member C has the same number of singularities of fixed singularity types and the corresponding (locally closed) subscheme H of the Hilbert scheme of S. We are mainly concerned with analytic resp. topological singularity types and give a sufficient condition for the smoothness of H (at C). Our results for S=P^2 seem to be quite sharp for families of cuves of small degree d.

Source: http://arxiv.org/abs/alg-geom/9503011v1

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Sep 22, 2013
09/13

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L. Dolan; S. Horvath

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For the closed superstring, spin fields and bi-spinor states are defined directly in four spacetime dimensions. Explicit operator product expansions are given, including those for the internal superconformal field theory, which are consistent with locality and BRST invariance for the string vertices. The most general BRST picture changing for these fields is computed. A covariant notation for the spin decomposition of these states is developed in which non-vanishing polarizations are selected...

Source: http://arxiv.org/abs/hep-th/9503210v1

This is a New Zealand classification of Peter Pepper Vol #1 . Title Peter Pepper Vol #1 Publication number 9400745 Application number 940100128 Medium Video Recording VHS/PAL Current decision R18 Objectionable except if the availability of the publication is restricted to persons who have attained the age of 18 years. Descriptive note Explicit sex scenes Associated documents 61407_18_4_48695.pdf (Register Page) Registration date 1995-03-10 Language English Country United States Related...

Topics: New Zealand, censorship

This is a New Zealand classification of Romeo is Bleeding . Title Romeo is Bleeding Publication number 9500088 Application number 950100044 Medium Video Slick Current decision Approved Associated documents 62187_18_4_49093.pdf (Reg 32 Notice of Decision) Registration date 1995-03-09 Language English Country United States Related publications 9500087 Classification body Office of Film and Literature Classification (1994–) Submission channel Section 12(1) - Labelling Body

Topics: New Zealand, censorship

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Sep 22, 2013
09/13

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C. Moellenhoff; M. Matthias; O. E. Gerhard

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Visual, NIR, and H_alpha surface photometry of the oval disk galaxy M94 (NGC 4736) was performed to study the distribution of mass in old stars and the distribution of the warm emission line gas. The radial profile of the inner stellar disk is steeper than exponential and displays twisted and deformed isophotes. Dust is not responsible for these deviations. The investigation of a number of morphological models showed that M94 has a weak central stellar bar of 0.7 kpc major axis length which...

Source: http://arxiv.org/abs/astro-ph/9503032v1

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Sep 22, 2013
09/13

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L. Kaper; H. J. G. L. M. Lamers; E. Ruymaekers; E. P. J. van den Heuvel; E. J. Zuiderwijk

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Wray 977, the B supergiant companion of the X-ray pulsar GX301-2, should be classified as B1~Ia+, based on a comparison of its optical spectrum to that of zeta1 Sco, a well-known B hypergiant and ONE OF THE BRIGHTEST STARS IN THE GALAXY. The classification of Wray 977 as a hypergiant results in a new distance determination of the binary system, i.e. 5.3 kpc (previously 1.8 +/- 0.4 kpc). The ``average'' X-ray luminosity of the pulsar is then ~10^37 erg/s, in good agreement with the predicted...

Source: http://arxiv.org/abs/astro-ph/9503003v1

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Sep 22, 2013
09/13

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M. Santos-Lleo; J. Clavel; P. Barr; I. S. Glass; D. Pelat; B. M. Peterson; G. Reichert

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We discuss the results of a campaign to monitor spectral variations in the low-luminosity Seyfert~1 galaxy NGC~4593, at X-rays, ultraviolet, optical and near IR frequencies. The observations and data analysis have been described in a companion paper (Santos-Lle\'o et al. 1994; Paper~1). The active nucleus in this galaxy is strongly and rapidly variable in all wavebands, implying that the continuum source is unusually compact. Its energy distribution from 1.2~$\mu$m to 1200~\AA\/ obeys a...

Source: http://arxiv.org/abs/astro-ph/9503024v1

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Sep 22, 2013
09/13

by
V. Testa; F. R. Ferraro; E. Brocato; V. Castellani

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Deep CCD photometry down to V=24.5 is presented for the old Magellanic Globular cluster NGC 2257. The main result cna be summarized as follows: i) the RGB Bump has been detected at V=18.7+-0.1, and is compatible with determination of this feature in GGCs; ii) NGC 2257 seems to be 2-3 Gyrs younger than a typical GGC; iii) the helium abundance has been estimated to be Y=0.21+-0.03, using the R- method as calibrated by Buzzoni et al., 1983.

Source: http://arxiv.org/abs/astro-ph/9503097v1

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Sep 22, 2013
09/13

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G. Sigl; K. Jedamzik; D. N. Schramm; V. S. Berezinsky

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We consider the production of $^3$He and $^2$H by $^4$He photodisintegration initiated by non-thermal energy releases during early cosmic epochs. We find that this process cannot be the predominant source of primordial $^2$H since it would result in anomalously high $^3$He/D ratios in conflict with standard chemical evolution assumptions. We apply this fact to constrain topological defect models of highest energy cosmic ray (HECR) production. Such models have been proposed as possible sources...

Source: http://arxiv.org/abs/astro-ph/9503094v1

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Sep 22, 2013
09/13

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R. B. Palmer; J. C. Gallardo; R. C. Fernow; H. Kirk; I. Stumer; Y. Y. Lee; M. Syphers; Y. Torun; D. Winn; D. Neuffer; Y. Cho; J. Norem; N. Mokhov; R. Noble; A. Tollestrup; R. Scanlan; S. Caspi; O. Napoly

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We discuss the various beam dynamics problems in muon collider systems, starting from the proton accelerator needed to generate the muon beams and proceeding through the muon storage ring.

Source: http://arxiv.org/abs/acc-phys/9503002v1

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Sep 22, 2013
09/13

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J. Schechter; H. Weigel

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We formulate the particle conjugation operation and its convenient realization as $G$--parity in the framework of several chiral soliton models. The Skyrme model, the Skyrme model with vector mesons and the chiral quark model are specifically treated. The vector and axial vector currents are classified according to their behavior under $G$--parity. In the soliton sector particle conjugation constrains {\it a priori} ambiguous orderings of operators in the space of the collective coordinates. In...

Source: http://arxiv.org/abs/hep-ph/9410321v2

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Jul 20, 2013
07/13

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C. Giunti; C. W. Kim; J. D. Kim

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Motivated by the indication that both the atmospheric and the solar neutrino puzzles may simultaneously be solved by (vacuum as well as matter-induced resonant) oscillations of two generations of neutrinos with large mixing, we have analyzed the data on the atmospheric and solar neutrinos assuming that all {\it three} neutrinos are maximally mixed. It is shown that the values of $ \Delta m^2 $ obtained from the two-generation analyses are still valid even in the three-generation scheme, i.e....

Source: http://arxiv.org/abs/hep-ph/9411219v4

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Sep 22, 2013
09/13

by
Kajia Yuan

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The untwisted moduli in four-dimensional fermionic string models are identified by considering world-sheet Abelian Thirring interactions. The full Kahler potentials of untwisted sector fields are given for a restricted class of models.

Source: http://arxiv.org/abs/hep-ph/9503247v1

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Sep 22, 2013
09/13

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R. S. Chivukula; B. A. Dobrescu; J. Terning

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Recently, Hill has proposed a model in which new, potentially low-energy, top-color interactions produce a top-condensate ({\em a la} Nambu---Jona-Lasinio) and accommodate a heavy top quark, while technicolor is responsible for producing the $W$ and $Z$ masses. Here we argue that isospin breaking gauge interactions, which are necessary in order to split the top and bottom quark masses, are likely to couple to technifermions. In this case they produce a significant shift in the $W$ and $Z$...

Source: http://arxiv.org/abs/hep-ph/9503203v1

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Sep 21, 2013
09/13

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P. Bamert; C. P. Burgess; I. Maksymyk

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We study the implications of possible off-peak measurements in the 1995 LEP run, in regard to probing physics beyond the Standard Model. To do so, we determine the accuracy with which various nonstandard couplings can be expected to be measured in the three different scan scenarios recently discussed by Clarke and Wyatt. We find that each scan scenario allows greater sensitivity to a different set of new physics couplings. Oblique parameters are best measured with the longest scan, while...

Source: http://arxiv.org/abs/hep-ph/9502402v2

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Sep 22, 2013
09/13

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J. Kwiecinski; A. D. Martin; P. J. Sutton

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We solve a unified integral equation to obtain the $x, Q_T$ and $Q$ dependence of the gluon distribution of a proton in the small $x$ regime; where $x$ and $Q_T$ are the longitudinal momentum fraction and the transverse momentum of the gluon probed at a scale $Q$. The equation generates a gluon with a steep $x^{- \lambda}$ behaviour, with $\lambda \sim 0.5$, and a $Q_T$ distribution which broadens as $x$ decreases. We compare our solutions with, on the one hand, those that we obtain using the...

Source: http://arxiv.org/abs/hep-ph/9503266v1

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Sep 22, 2013
09/13

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The MILC Collaboration; C. Bernard; T. Blum; A. De; T. DeGrand; C. DeTar; Steven Gottlieb; Urs M. Heller; N. Ishizuka; L. Kärkkäinen; J. Labrenz; K. Rummukainen; A. Soni; R. Sugar; D. Toussaint

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Preliminary results from the MILC collaboration for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios are presented. We compute in the quenched approximation at $\beta=6.3$, 6.0 and 5.7 with Wilson light quarks and static and Wilson heavy quarks. We attempt to quantify all systematic errors other than quenching, and have a first indication of the size of quenching errors.

Source: http://arxiv.org/abs/hep-ph/9503336v1

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Sep 22, 2013
09/13

by
Pierre Sikivie

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In the first section, I will try to convey a sense of the variety of observational inputs that tell us about the existence and the spatial distribution of dark matter in the universe. In the second section, I will briefly review the four main dark matter candidates, taking note of each candidate's status in the world of particle physics, its production in the early universe, its effect upon large scale structure formation and the means by which it may be detected. Section 3 concerns the energy...

Source: http://arxiv.org/abs/hep-ph/9503292v2

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Sep 22, 2013
09/13

by
Gerhard A. Schuler; Torbjörn Sjöstrand

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The structure of the general solution of the inhomogeneous evolution equations allows the separation of a photon structure function into perturbative (``anomalous") and non-perturbative contributions. The former part is fully calculable, and can be identified with the high-mass contributions to the dispersion integral in the photon mass. Properly normalized ``state" distributions can be defined, where the $\gamma\to\qqbar$ splitting probability is factored out. These state...

Source: http://arxiv.org/abs/hep-ph/9503384v1

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Sep 22, 2013
09/13

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Thomas W. Kephart; Tanmay Vachaspati

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We propose a criterion to classify hybrid defects occurring in field theoretic models such as the standard electroweak model. This criterion leads us to consider the minimal extension of the electroweak model in which electroweak magnetic monopoles and $Z$-strings are topological. We briefly discuss the cosmology of such defects.

Source: http://arxiv.org/abs/hep-ph/9503355v1

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Sep 22, 2013
09/13

by
E. Papageorgiu

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We reexamine the prospects of searching for a neutral Higgs boson in the intermediate-mass range, using the proton- and ion-beam facilities of the LHC to study coherent two-photon processes. Considering realistic design luminosities for the different ion beams, we find that beams of light-to-medium size ions like calcium will give the highest production rates. With a suitable trigger and assuming a b-quark identification efficiency of $30\%$ and a $b{\bar b}$ mass resolution of 10 GeV one could...

Source: http://arxiv.org/abs/hep-ph/9503372v1

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Sep 22, 2013
09/13

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J. Baacke

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The fluctuation determinant which determines the preexponential factor of the transition rate for minimal bubbles is computed for the electroweak theory with $\sin \Theta_W = 0$. As the basic action we use the three-dimensional high-temperature action including, besides temperature dependent masses, the $T \Phi^3$ one-loop contribution which makes the phase transition first order. The results show that this contribution (which has then to be subtracted from the exact result) gives the dominant...

Source: http://arxiv.org/abs/hep-ph/9503350v1

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Sep 22, 2013
09/13

by
Adam F. Falk

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Theoretical aspects of rare $B$ decays are reviewed. The focus is on the relation between short-distance interactions and physical observables. It is argued that there remain significant uncertainties in the theoretical treatment of certain important quantities. (Talk presented at the International Symposium on Vector Boson Interactions, University of California, Los Angeles, February 1-3, 1995)

Source: http://arxiv.org/abs/hep-ph/9503485v1

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Sep 22, 2013
09/13

by
Samuel W. MacDowell; Ola Törnkvist

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Vortex configurations in the electroweak gauge theory are investigated. Two gauge-inequivalent solutions of the field equations, the Z and W vortices, have previously been found. They correspond to embeddings of the abelian Nielsen-Olesen vortex solution into a U(1) subgroup of SU(2)xU(1). It is shown here that any electroweak vortex solution can be mapped into a solution of the same energy with a vanishing upper component of the Higgs field. The correspondence is a gauge equivalence for all...

Source: http://arxiv.org/abs/hep-ph/9503460v1

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Sep 22, 2013
09/13

by
Jan Ambjorn; Jerzy Jurkiewicz

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We discuss scaling relations in four dimensional simplicial quantum gravity. Using numerical results obtained with a new algorithm called ``baby universe surgery'' we study the critical region of the theory. The position of the phase transition is given with high accuracy and some critical exponents are measured. Their values prove that the transition is continuous. We discuss the properties of two distinct phases of the theory. For large values of the bare gravitational coupling constant the...

Source: http://arxiv.org/abs/hep-th/9503006v1

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Sep 22, 2013
09/13

by
Willy Fischler; Sonia Paban; Moshe Rozali

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The emergence of violations of conformal invariance in the form of non-local operators in the two-dimensional action describing solitons inevitably leads to the introduction of collective coordinates as two dimensional ``wormhole parameters''.

Source: http://arxiv.org/abs/hep-th/9503072v1

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Sep 22, 2013
09/13

by
B. Sazdović

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The connection between the Kac-Moody algebras of currents and the chiral symmetries of the two dimensional WZNW model is clarified. It is shown that only the zero modes of the Kac-Moody currents are the first class constraints, and that, consequently, the corresponding gauge symmetries are chiral.

Source: http://arxiv.org/abs/hep-th/9503147v1

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Sep 22, 2013
09/13

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C. C. Lassig; G. C. Joshi

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The nonassociativity of the octonion algebra necessitates a bimodule representation, in which each element is represented by a left and a right multiplier. This representation can then be used to generate gauge transformations for the purpose of constructing a field theory symmetric under a gauged octonion algebra, the nonassociativity of which appears as a failure of the representation to close, and hence produces new interactions in the gauge field kinetic term of the symmetric Lagrangian.

Source: http://arxiv.org/abs/hep-th/9503189v1

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Sep 22, 2013
09/13

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Joel Feldman; Jacques Magnen; Vincent Rivasseau; Eugene Trubowitz

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In these notes we give a very rough sketch of nonperturbative methods of many body quantum field theory that are powerful enough to rigorously control weak coupling instabilities in condensed matter phyics, for example, the Cooper instability in an electron - phonon system.

Source: http://arxiv.org/abs/cond-mat/9503047v1

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Sep 22, 2013
09/13

by
R. Sugano; T. Onogi; Y. Murayama

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We have investigated the effect of thermal fluctuation on the interlayer coupling of three-dimensional Josephson-junction arrays with anisotropic interactions as a model of layered high-$T_c$ oxides, focusing on non-Ohmic current-voltage characteristics. Langevin dynamic simulations were performed for various Josephson-coupling anisotropies and for various temperatures in both zero and finite magnetic fields. We find that, in the highly anisotropic region, the interlayer coupling, which causes...

Source: http://arxiv.org/abs/cond-mat/9503039v1

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Sep 22, 2013
09/13

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T. J. P. Penna; D. Stauffer

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A bit-string model of biological life-histories is parallelized, with hundreds of millions of individuals. It gives the desired drastic decay of survival probabilities with increasing age for 32 age intervals.

Source: http://arxiv.org/abs/cond-mat/9503100v1

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Sep 22, 2013
09/13

by
Sanjoy K. Sarker

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The normal-state resistivity of the cuprate superconductors is metallic in the $ab$ plane but is characteristic of an insulator along the $c$ direction, leading to the possibility of the remarkable phenomenon of confinement. By continuity, such a behavior is not expected to occur in a Fermi liquid. We consider the anisotropic $t$-$J$ model with the c-axis parameters $t_c$ and $J_c$ different from their in-plane counterparts, $t$ and $J$. Within the slave-fermion mean-field approximation it is...

Source: http://arxiv.org/abs/cond-mat/9503162v1

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Sep 22, 2013
09/13

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E. A. Bartnik; J. A. Tuszynski; D. Sept

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The Davydov model of energy transfer in molecular chains is reconsidered assuming the distance dependence of the exciton hopping term. New equations of motion for phonons and excitons are derived within the coherent state approximation. Solving these nonlinear equations result in the existence of Davydov-like solitons. In the case of a dilatational soliton, the amplitude and width is decreased as a results of the mechanism introduced here and above a critical coupling strength our equations do...

Source: http://arxiv.org/abs/cond-mat/9503131v1

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Sep 22, 2013
09/13

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J. Machta; R. Greenlaw

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In this paper we examine a number of models that generate random fractals. The models are studied using the tools of computational complexity theory from the perspective of parallel computation. Diffusion limited aggregation and several widely used algorithms for equilibrating the Ising model are shown to be highly sequential; it is unlikely they can be simulated efficiently in parallel. This is in contrast to Mandelbrot percolation that can be simulated in constant parallel time. Our research...

Source: http://arxiv.org/abs/cond-mat/9503170v1

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Sep 22, 2013
09/13

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G. N. Parfionov; R. R. Zapatrin

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The new approach to quantize the gravity based on the notion of differential algebra is suggested. It is shown that the differential geometry of this object can not be described in terms of points. The spatialization procedure giving rise to points by loosing a part of the entire structure is discussed. The counterpart of the traditional objects of differential geometry are studied.

Source: http://arxiv.org/abs/gr-qc/9503048v1

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Sep 23, 2013
09/13

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R. Blumenhagen; W. Eholzer; A. Honecker; K. Hornfeck; R. Huebel

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We construct several quantum coset W-algebras, e.g. sl(2,R)/U(1) and sl(2,R)+sl(2,R) / sl(2,R), and argue that they are finitely nonfreely generated. Furthermore, we discuss in detail their role as unifying W-algebras of Casimir W-algebras. We show that it is possible to give coset realizations of various types of unifying W-algebras, e.g. the diagonal cosets based on the symplectic Lie algebras sp(2n) realize the unifying W-algebras which have previously been introduced as `WD_{-n}'. In...

Source: http://arxiv.org/abs/hep-th/9406203v2

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Jul 20, 2013
07/13

by
Jonathan M. Evans; Timothy J. Hollowood

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A series of sigma models with torsion are analysed which generate their mass dynamically but whose ultra-violet fixed points are non-trivial conformal field theories -- in fact SU(2) WZW models at level $k$. In contrast to the more familiar situation of asymptotically free theories in which the fixed points are trivial, the sigma models considered here may be termed ``asymptotically CFT''. These theories have previously been conjectured to be quantum integrable; this is confirmed by postulating...

Source: http://arxiv.org/abs/hep-th/9407113v2

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Sep 22, 2013
09/13

by
I. L. Egusquiza

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We study the selfadjoint extensions of the spatial part of the D'Alembert operator in a spacetime with two changes of signature. We identify a set of boundary conditions, parametrised by U(2) matrices, which correspond to Dirichlet boundary conditions for the fields, and from which we argue against the suggestion that regions of signature change can isolate singularities.

Source: http://arxiv.org/abs/gr-qc/9503015v1

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Sep 22, 2013
09/13

by
S. Abachi

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We have directly measured the ZZ-gamma and Z-gamma-gamma couplings by studying p pbar --> l+ l- gamma + X, (l = e, mu) events at the CM energy of 1.8$ TeV with the D0 detector at the Fermilab Tevatron Collider. A fit to the transverse energy spectrum of the photon in the signal events, based on the data set corresponding to an integrated luminosity of 13.9 pb^-1 ($13.3 pb^-1) for the electron (muon) channel, yields the following 95% confidence level limits on the anomalous CP-conserving...

Source: http://arxiv.org/abs/hep-ex/9503010v1

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Sep 22, 2013
09/13

by
Ken Yee

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I evaluate S_{APQCD}, the exact action of Abelian projection QCD, using the microcanonical demon method. Starting with a trial action consisting of L=1, L=2, & L=3 LxL plaquettes plus a Smit-van-der-Sijs magnetic monopole ``mass'' operator, I show that coefficients of the L=2 and L=3 plaquettes vanish at all beta_{SU2}. In fact, at strong coupling S_{APQCD} is essentially the 1x1 compact QED action with beta_{U1}=beta_{SU2}/2. Beyond beta_{SU2}>=2, S_{APQCD} gains an exogenous negative...

Source: http://arxiv.org/abs/hep-lat/9503003v1

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Sep 19, 2013
09/13

by
C. Christou; F. K. Diakonos; H. Panagopoulos

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We study domain formation in the two-dimensional O(3) model near criticality. The fractal dimension of these domains is determined with good statistical accuracy.

Source: http://arxiv.org/abs/hep-lat/9501006v3